APC AP04742 4.7x4.2E Electric Propeller for Speed 400 Motors  [AP04742]

APC PROPELLER 4.7x4.2 E ELECTRIC (SPEED 400 MOTOR)
Price:
NZD$6.52
Brand:
APC
Model:
AP04742
Condition:
Brand New
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Compact 4.7x4.2E Prop for Speed 400 Electric Motors

The APC AP04742 prop is constructed to the 4.7x4.2E specification and matches typical Speed 400 motor applications in small electric model aircraft and similar projects. It provides a straightforward replacement option for hobbyists needing a reliable spare or a simple thrust change.

Fitting is conventional for small electric props: confirm the prop hub fits your Speed 400 shaft or adapter, secure with the proper nut or retainer, and make sure the blade faces the correct direction for your motor rotation. Conduct a low-throttle static check to confirm secure mounting before normal use.

For maintenance and tuning, check both blade tips and the hub for wear or damage and replace as necessary. Basic balancing using a dedicated balancer or a manual centre-check will help cut vibration and improve throttle smoothness on light electric models.

How precise is the AP04742 size for Speed 400 setups?

The AP04742 is made to the 4.7x4.2E spec suitable for Speed 400-class motors, but you should still check shaft and adapter tolerances to ensure a snug fit.

Any tips to fine-tune thrust with this propeller?

Minor thrust changes are achieved by adjusting pitch header or trying a slightly different blade size; for this prop, balancing is the simplest step to reduce vibration and improve effective thrust.

Can I reuse the prop after a minor ding?

Small nicks can sometimes be smoothed and rebalanced, but any crack near the hub or persistent imbalance after correction means you should replace the prop.

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